Welcome to Volcanoes!

By:Dorothy, Manuel, Kyle, and Isabella

-Diagram of Volcano
external image volcano_bw.GIF
-Types of volcanoes
1.Shield Volcano-Quiet eruptions spread out silicon-poor lava in flat layers. The buildup of these latyer forms a shield volcano.
2.Cinder Cone Volcano- When tephra falls to the ground after small eruptions, it forms a steep-sided, loosely packrd conder cone volcano.
3.Composite Volcano- A volcano erupts releasing gas and ash, forming a thephra layer, and then has a quiet eruption in which lava flows on top of the tephra layer. When this process is repeated it makes a composite volcano.

http://nativityschool.com/grade_8/volcano/volcano3.htm
The Nevado del Ruiz Volcano, Colombia
1985
25,000 deaths
Mudflows were the main cause of death.
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